In July 1949, JNR President Sadanori Shimoyama suddenly disappeared and was found dead in the rubble. The case is said to be the largest unsolved case during the occupation, and even now, more than 70 years later, it is still shrouded in many mysteries.

The NHK special "Series Unsolved Cases" broadcast on March 30th (Saturday) examines the incident in two parts: a drama and a documentary. It sheds new light on the mysteries of the incident, which many writers and journalists have tried to uncover, and on the "darkness of Japan"